@article{article79065eef,
title   = {Pollen harvest by eusocial bees in a non-natural community in Brazil},
author = {Imperatriz-Fonseca, Vera Lucia and Kleinert, Astrid de Matos Peixoto and Ramalho, M},
year = {1989},
doi = {10.1017/s0266467400003539},
journal   = {Journal of Tropical Ecology}
}